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Bizzarrini Ersus. p. A. was an Italian automotive manufacturer inside the 1960s founded by former Alfa Romeo, Ferrari and ISO electrical engineer, Giotto Bizzarrini. The company built a small number of highly developed and superior sport and racing vehicles before failing in 1969. Notable models include the particular 5300 GT Strada as well as the P538S.Originally Prototipi Bizzarrini ersus. r. l., the name was altered to Bizzarrini S. p. A. in 1966. The Bizzarrini marque has been revived with quite a few concept cars in the actual 2000s.Giotto Bizzarrini was created in Livorno, Italy in 1926. His father was a rich landowner who came from a family with sturdy roots in Tuscany plus the city of Livorno. His grandfather, also named Giotto Bizzarrini, was a biologist who had worked with Guglielmo Marconi on the inventions, especially the radio, following which one in the Livorno Library sections seemed to be named The Bizzarrini Collection.Bizzarrini graduated as an engineer from the University of Pisa throughout 1953. He taught briefly prior to joining Alfa Romeo in 1954. He worked for Alfa Romeo via 1954 to 1957. He began working pertaining to Ferrari in 1957, eventually becoming controller connected with experimental, Sports and GT auto development. He worked at Ferrari as being a developer, designer, test driver, and chief engineer intended for five years. His developments there bundled the Ferrari 250 TR, the Ferrari 250 GT SWB (Small Wheelbase Berlinetta or Berlinetta Passo Corto), and the 1962 Ferrari 300 GTO.

Bizzarrini seemed to be fired by Ferrari through the "palace revolt" of 1961. He became part connected with Automobili Turismo e Sports activity (ATS)), a company started from the ex-Ferrari engineers to develop a Formula 1 single seater as well as a GT sport car, the A. T. S. Serenissima.One of ATS's personal backers, Count Giovanni Volpi, owner of Scuderia Serenissima, hired Bizzarrini to improve a Ferrari 250 GT SWB, with chassis number #2819GT to GTO specifications. This resulted in this Ferrari 250 GT SWB Drogo also called the "Breadvan".Bizzarrini's engineering company, Societa Autostar, was commissioned to design a V-12 engine for any GT car to possibly be built by another not satisfied Ferrari customer, Ferruccio Lamborghini. Lamborghini considered the resulting engine to become too highly strung, and ordered that this be detuned.

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Bizzarrini worked since 1964 for Iso Rivolta and designed three models: Iso Rivolta GT, Iso Grifo both A3L and A3C versions. His work was to develop a pressed steel frame chassis for Iso vehicles. Renzo Rivolta hired him as consultant on the Iso Gordon GT project which became the Iso Rivolta GT. The Iso Gordon GT prototype was created from the Gordon-Keeble. The Gordon Keeble GT has been designed in 1960 through Giugiaro. Bizzarrini tested the car and was impressed from the powerful V8 Corvette engine and the rear De Dion tube useful for the GT:'Rivolta experienced me test the prototype. I liked its De Dion conduit and especially the Corvette powerplant. It was the very first time that I had driven one. It was superior in order to Ferrari's engines, having the same power but having a more immediate throttle response. 'The Iso Rivolta GT has been a Giugiaro designed several seater with beautiful body, speed, comfort and handling, and was a productive car for ISO using 799 units sold. Powered by a 327ci Chevrolet Corvette V8 engine that has a classic De Dion raise suspension design with forced steel monocoque bodywork in excess of pressed steel frame chassis. Unveiled to the push in 1963, production continued until 1970.The Iso Grifo A3L had been a monstrous idea for the super coupé, the L coming through Lusso. The result of the particular brilliant Giugiaro and Bizzarrini operating together, it was based on a shortened Iso Rivolta GT chassis and was debuted at the 1963 Turin show. The Grifo epitomised the 1960s Italian style with its handsome low and large handmade bodywork. It was the best production car tested by Autocar Magazine in 1966 which has a top speed of 160 mph (260 km/h). Later versions of this Grifo were powered by way of big block Chevrolet Corvette 435 bhp (324 kW; 441 PS) engine. These 90 handbuilt units are distinguishable from the raised "pagoda style" info bonnet. Some of these Iso Grifo 7 Litri products were rebuilt later with even bigger engines.

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Thinking about Bizzarrini was to make use of the 3AL cars for opposition. The competition versions in the Grifo were named Iso Grifo A3C, C for Competizione or even Corsa. A new lightweight riveted lightweight alloy body was designed and also built by Piero Drogo. It was an strongly designed machine, oriented to endurance races. It uses normal ISO underpinnings though the engine was moved further last the chassis frame compared to the Grifo A3L, protruding well into the particular driver's cabin, fitted with hot cameras and fed by some big Weber carburettors, giving more than 600 bhp (298 kW; 406 PS).

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About 29 A3C sport cars were built under the ISO name. Five of these 29 cars were bodied throughout plastic/fiberglass by Piero Drogo from Carrozzeria Sports Cars within Modena. A3Cs were widely ran. Some cars entered this 1964 and 1965 Le Mans 24 hour, 1965 Nürburgring 1000 and also 1965 Sebring. It achieved a Le Mans class win in both years and a 9th overall in 1965 without any factory support. A3Cs were one in the fastest cars on LeMans' Mulsanne Immediately in both years.

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